In one study described in the textbook (bursztyn & jensen, 2014), high school students taking a combination of honors and nonhonors classes were offered an opportunity to sign up for a free sat preparation course. the students were told either that no one would learn of their decision to sign up or that only the students in the room would learn of their decision. the opportunity was offered either when the students were in one of their honors classes or in one of their nonhonors classes. whether no one or the other students in the room would learn of students' decisions was a(n) variable in this study.
a. observational
b. dependent
c. independent
d. correlational

Independent variable

Explanation:

Independent variable can be defined as the variable that is changed or controlled in the experiment. The independent variable is changed during the experiment in order to see the effect of dependent variable which changes due to change in the independent variable.

Here, the given statement is independent variable in which the no one or other students in room would learn students.

This is independent variable as dependent variable will change based on independent variable.

it's a nutrition food for pregnant mothers so they unborn child can get its nutrition that it needs to grow in to a healthy baby.

explanation:

and the mother is getting all of her nutrition and her calcium and vitamins .

i think it would be b the increase in body temp