1.

(C) The study under review was based on both primary and tertiary data.

A. The study under review was based on both primary or tertiary data.
B. The study under review is based on both primary and tertiary data.
C. The study under review is based on both primary and secondary data.
D. The study under review was based on both primary and secondary data.
E. No replacement required
Answer» D. The study under review was based on both primary and secondary data.


Discussion

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