Answer:
Option A is correct
9 flowers per arrangement will there be.
Explanation:
Unit rate defined as the rate are expressed as a quantity as 1 such as 4 miles per hour or 3 meter per seconds.
As per the statement:
The party planner has 126 flowers and 14 vases for arrangements.
⇒Number of flowers = 126 and
Number of Vases for arrangement= 14
by definition of unit rate;

Substitute the given values we have;

therefore, 9 flowers per arrangement will there be.