Answer:
Option 3rd is correct
the circumference of the a circular swimming pool is, 88 ft
Explanation:
Circumference of the circle(C) is given by:

where,
r is the radius of the circle.
As per the statement:
A contractor is building a circular swimming pool. The radius of the circle 14 feet.
⇒ r = 14 ft
Substitute the given values in [1] we have;

Simplify:

Therefore, the circumference of the a circular swimming pool is, 88 ft