Which word below is the best replacement for the underlined word? Arnold says, "Humanity is on the edge of important discoveries about how our genes really work." Select one:
A. mentions
B. whispers
C. declares​

C

Explanation:

Without much context, this seems like a grand statement. As such, I'd say declares is the best word to replace "says". Hope it helps :)

halibut, flounder, tuna, and trout are all fish. so your first answer is 1.) fish. and since fish is edible, your next answer would be 3). edible

to describe those fishes more thoroughly, some of those fishes live in fresh water, and some of the fishes live in salt water, and that is not a thing that they all have in common. the question is asking what is common with all of the fish, so answer choices 2). fresh water and 4). salt water are not right.

option 2

explanation: