Answer: The correct option is (A) UT.
Step-by-step explanation: Given that RSTU is a parallelogram.
We are to select the correct option which completes the following:
RS = ?
In a PARALLELOGRAM, the opposite sides are parallel and congruent.
Sincs RS is a side of the parallelogram RSTU and UT is its opposite side, therefore we must have
RS = UT.
Thus, the complete statement is
RS = UT.