Answer: <u>C Kamen's idea to enlarge the basement benefited both his work and his family</u>.
Explanation: Kamen managed to fit all of his machines in the basement after he made it larger, and he also made the pantry and kitchen bigger to benefit his mom.
A Kamen's family did not appreciate the enlargement of their basement.
There is no mention of Kamen's family's opinion in the text.
B Kamen's mother had complained about the size of her kitchen and pantry.
Kamen's mother did not show her opinion in the text.
D Kamen's machine shop still did not fit into the newly enlarged basement.
His machine definitely fit into the basment, as seen here "<em>I now had the entire machine shop in our basement.</em><em>"</em>
I hope this helps. Have a nice day!