Systematic and carefully analyses of spoken languages must be done by scholars.

Directions: In the question below, a sentence is given with a part of it printed in bold type. That part may contain grammatical error. This sentence is followed by phrases. Find out which phrase should replace the phrase given in bold to correct the error if there is any, and to make the sentence grammatically meaningful and correct if the sentence is correct as it is and no correction is required, mark (5) as the answer.