Which of the following are true about a software program? $($Check all that apply.$)$

a$.$

A program consists of instructions that accomplish a specific operation

b$.$

A program consists of instructions that must be executed in a particular sequence

c$.$

A program consists of instructions that can be executed in any order

d$.$

A set of program instructions is known as an algorithm

e$.$

A program is responsible for validating user inputs