Which sentence is a complex sentence? A. We saw that he was happy; his smile lit up the room.
B. He will keep the prize with his other prizes in his home.
C. He showed it to his family and to the reporters in the meeting
room.
D. The prizes, which were made in California, were made out of gold.
HELP ME PLS WHICH ONE IS THE ANSWER !?

it is D

Explanation: This is because a complex sentence contains a subordinate clause or clauses which means it has another part of the sentence that supports the first one so in this case "were made out of gold" supports "the prizes"

➕❎➕➕➖➗❌✖✔❗❗❗❗❗❗i dont understend you

active voice: my father cut the tree.

passive voice: the tree was cut by my father.

active voice: people buy newspapers every day.

passive voice: newspapers are bought (by people) every day.

active voice: people have been using movies as political propaganda since world war ii.

passive voice: movies have been used as political propaganda since world war ii.

active voice: donna gave me my birthday present.

passive voice: i was given my birthday present (by donna). / my birthday present was given to me (by donna).

active voice: mom will leave the keys on the counter.

passive voice: the keys will be left (by mom) on the counter.

the words in parentheses are the agent of the passive voice and can be omitted when obvious, generic, or simply unnecessary.