Can you please help me answer the following C programing questions

Multiple choice

1. Why is it important for a structured construct to have 1 entry point and 1 exit point.

a. it allows the contents of the construct to be changed without impacting the rest of the program

b. it makes the code faster to execute

c. it is impossible to make more than 1 entry and exit point

d. the rules of C state there cannot be more entry and exit points

2. A variable n could have values 1, 2 or 3. You want to execute a different sequence of statements for each of the possible values of n. What is the best way to do this?

a. use an iteration

b. use a compound condition

c. use a series of if where there is another if in the else portion of every if except the last.

d. use one nested inside the true sequence of another if

3. Select all of the following which are true about if statements.

a. they can execute a sequence or skip it entirely

b. they are a form of iteration

c. the selection is based on a condition

d. they can execute either one sequence or another

True or false

4. An if statement can contain either a single statement or a code block.

a. True

b. False