If 20 participants completed an attention task twice – once after consuming a sugar pill and once after consuming a pill that contained 25 mg nicotine, which type of research would this most likely be?

"harry t. moore (1905-1951) – civil rights activist, leader, and the first martyr of the civil rights movement. fannie lou hamer (1917–1977) – leader in the american civil rights movement; co-founder of the national women's political caucus and freedom democratic party. james farmer (1920–1999) – congress of racial equality."

which sentences ? that question is incomplete

a would be the answer