Teachers can improve a student's self-esteem by
a. discouraging imagination.
b. controlling the learning environment.
c. being critical of their work.
d. letting a student set his or her own goals.

The answer is D. letting a student set his or her own goals.This gives students more control on what they want to do and encourages learning.  The teacher though still plays an important role in guiding the students and setting up how to go about the assignments.

what are the choices? the multiple choices?

i will answer in the comments after the choices have been said.

a. formula: f=ma or f/m=a

10,000n/1,267kg≈7.9m/

b. formula: a= and s=d/t

speed= 394.6/15

s=26.3m/s

a=

a=1.75m/

c. 7.9-1.75=difference of 6.15m/

d. the force that most likely caused this difference is friction forces