Answer:
B. $4,000
Explanation:
The formula for the simple interest is
[tex]interest = P\cdot r \cdot t[/tex]
where
P is the principal
r is the interest rate
t is the number of years
In this problem,
P = 20,000 $
r = 0.05
t = 4 years
So the interest is
[tex]P=(20,000 $)(0.05 )(4)=4,000 $[/tex]