Trevor Knows He Wants to Give a Speech About the Effects

Trevor knows he wants to give a speech about the effects of condominium lighting on sea turtle nesting grounds. He wants to make condo owners aware of the dangers their lights pose to hatchlings. He tells his audience that reducing the lights that face the water increases the survival of hatchlings by 50 percent. He expresses how dear the cause is to his heart. He also believes this can realistically be accomplished. He did a lot of research on the web to prepare for the speech. Wikipedia was one of his primary sources. What part of this description points to Trevor's thesis?

A) Trevor knows he wants to give a speech about the effects of condominium lighting on sea turtle nesting grounds.
B) He wants to make condo owners aware of the dangers their lights pose to hatchlings.
C) He tells his audience that reducing the lights that face the water increases the survival of hatchlings by 50 percent.
D) He expresses how dear the cause is to his heart.