Simplify the following expressions: a) 90 + 40 - ( 20 + 53 - 75 ) + (100-50) b) 60 + 40 - 30 c) 90 + 80 - 13 d) 100 ÷ 2 + 90 ÷ 2 e) 30 + 120 - 80 + 50 - 20

The principal amount ($P$) is N 87,300.00.
The total amount ($A$) is N 99,522.00.
The interest rate ($R$) is 7% per annum, which is 0.07 in decimal form.
The time in years is $y$.
The simple interest ($I$) is the difference between the total amount and the principal.
The formula for simple interest is $I = \frac{P \times R \times y}{100}$ (when R is a percentage) or $I = P \times R \times y$ (when R is a decimal).

Using $I = P \times R \times y$ where $R$ is in decimal form:

The value of $y$ is 2 years.

The correct option is B.

$\boxed{\text{B. } 2}$