a group of researchers investigated the effects of two vocabulary learning strategies on word retention two weeks later. in this example, learning strategy is the variable and word retention is the variable.

d

explanation:

civil rights vs. civil liberties. civil liberties are basic freedoms while civil rights are the basic right to be free from discrimination based on such characteristics as race, disability, color, gender, national origin, and others. discriminating against an employee on the basis of gender is a civil rights violation.

the article must be ratified by three-fourths (38) of states within a proscribed deadline.

source:

the answer would be c. sediment buildup on continental slope

                                                                                -hope this -