Caregivers should begin to offer babies objects to hold when the babies are approximately old.
a. three months
b. two months
c. one month
d. four months

D. Four months

Explanation:

Got it correct on the PF test

Hope this helps! :)

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.