Question

Three forms of business letters are the adjustment letter, the ___ letter and the ___ letter

A. order
B. invitaion
C. friendly
D. thank-you
E. application

Answer 1

I suggest application and order

Answer 2

• 
  `\bf{Order }`
• 
  `\bf{Application }`

Step-by-step explanation:

Three forms of business letters are the adjustment letter, the order letter and the application letter