The team’s efforts to develop a new type of battery that would be both environmentally friendly and cost-effective have been a long process. The team has been working for years, and they have made significant progress in their research. The team has encountered many challenges along the way, but they have learned from these challenges and have continued to strive towards their goal.
","stem_html":"Which choice best combines the sentences at the underlined portion to maintain the formal style of the passage?
","rationale_html":"Choice C is correct because it combines the sentences with a semicolon, a punctuation mark used to link independent clauses, which is appropriate for the formal style of the passage. Choice A is incorrect because it creates a run-on sentence. Choice B is incorrect because it is too wordy and repetitive. Choice D is incorrect because it creates a comma splice.
","correct_answer":["C"],"has_media":false,"has_mathml":false,"has_table":false,"source_created_at":null,"source_updated_at":null,"options":[{"label":"A","content_html":"The team has been working for years, and they have made significant progress in their research, but they have encountered many challenges along the way.
","ord":0},{"label":"B","content_html":"The team has been working for years, and they have made significant progress in their research, but they have encountered many challenges along the way, and they have learned from these challenges.
","ord":1},{"label":"C","content_html":"The team has been working for years, and they have made significant progress in their research; however, they have encountered many challenges along the way.
","ord":2},{"label":"D","content_html":"The team has been working for years, and they have made significant progress in their research; although they have encountered many challenges along the way.
","ord":3}],"attribution":{"source_id":"opensat","source_name":"OpenSAT community question bank","rights_holder":"OpenSAT contributors","canonical_url":"https://github.com/Anas099X/OpenSAT","retrieved_from":"https://pinesat.duckdns.org/api/questions","attribution":"Reading and Writing practice questions from the OpenSAT community question bank, whose licence permits free use of the database.","disclaimer":"OpenSAT items are community-written or AI-generated practice material, not official College Board questions; quality varies.","license":"OpenSAT LICENSE.md: the database may be used freely, including commercially, without restriction. Code is separately restricted.","redistributable":true,"item_count":1406}}