Hard SAT Math Question on Simplifying Rational Expressions

One of the difficult questions I ran into on the SAT Math calculator section on adding rational expressions

0:00 Intro
0:20 Multiplying the a common denominator
1:00 Cancel the fractions
1:45 Simplify

[mikulramesh]

Just take the LCM of the denominator and we know that 1/(1/x)=x so we get B

[sabertoothig]

So easy, why say hard?? It's like 5 grade