Select the correct answer.

B

Step-by-step explanation:

With limits, the first thing one should always try is direct substitution. Therefore, let's try that.

Therefore:

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square