[ Correlative Conjunction ]
The study aims to investigate ________ the genetic factors ________ the environmental influences.
A. either-or
B. not only-but
C. both-and
D. neither-for

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A. Has got
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Vocabulary and Verb Tenses › View
Engineer
A. A person who designs, builds, or maintains engines, machines, or structures.
B. A professional who manages financial investments and portfolios.
C. An individual who creates artistic works and designs.
D. A scientist who conducts experiments in a laboratory.