Select the most appropriate option to substitute the highlighted segment in the given
sentence.
Purchasing furniture at a low cost could not involve abandoning design or quality.

Correct option is A

The most appropriate option to substitute the highlighted segment in the given sentence is (a) should not entail sacrificing.
 The original sentence is conveying that buying furniture at a low cost should not require giving up on design or quality.
 "Should not entail sacrificing" effectively captures this meaning.