Which of these sentence contains a subordinate clause?
a. the goal of both men was to win the election at all costs.
b. darkness descended on the countryside, and many stars became visible.
c. i may seem calm before a performance, but inside i am really quite nervous.
d. although spain ruled the colony for nearly 300 years, peru won independence in 1826.

ok so like i went to wiki and looked up the (constitution x new "hammystan")and it showed me the picture it highlights new hampshire and says first and second session and than it says that they hit up the u.s and was like "ey dude that paper u sent us was adopted it bro thx" xd syays it all on wiki/the pic

i dont really like reading so i guess other people might not like reading either so   imma put the answer in bold italics