The extended version of the link given shows a triangle with sides of measurements equal to 13, 16, and 15 units.
Since we are given with the measurements of all sides, we use the Heron's formula.
A = sqrt ((s)(s - a)(s - b)(s - c))
where s is the semiperimeter and a, b, and c are the measures of the sides.
s = (a + b + c) /2
s = (13 + 15 + 16) / 2 = 22
Substituting this to the equation for the area,
A = sqrt ((22)(22 - 13)(22 - 15)(22 - 16))
A = 91.19 square units
Thus, the area is approximately equal to 91.2 square units. The answer is letter B.