Life coaches use to teach people life skills, relationship skills, and communication skills.
a.
telephone interviewing
b.
standardized tests
c.
motivational interviewing
d.
psychological tests

Life coaches use :
C. motivational interviewing  to teach people life skills, relationship skills and communication skills
This way, the audience will be able to relate easily to the coaching

hope this helps

Ithink it's c selection but i don't really know.