Answer:
Option d. $26.3 billion is the answer.
Explanation:
The NCUA pays to cover several failed credit unions = $1.36 billion
The fund is drains from its reserve fund = 5.18%
Let the fund to begin with be = x
Now equation would be
5.18% of x = $1.36 billion
Find the value of x
x = 1,360,000,000
0.0518x = 1,360,000,000

= 26,254,826,254.826 rounded to 26.3 billion
Option d. $26.3 billion is the answer.