Acting humble or friendly or making someone feel good or important before making a request are influence tactics known as

a. coalition tactics

b. inspirational appeals

c. consultation

d. ingratiating tactics

e. personal appeals

What the person is doing is using a group of tactics called (D) ingratiating tactics.

There are various types of ingratiating tactics, which includes the one described above: modesty (acting humble) and complimentary-other enhancement (making someone feel good or important).

Ingratiating tactics can be broadly defined as a group of psychological techniques to influence other people by making the user of these techniques more likeable.