[ Grammar - Punctuation ]
Prof Diaz have you met Dr Petrozelli?
A. Prof. Diaz, have you met Dr. Petrozelli?
B. Prof. Diaz have you met Dr. Petrozelli?
C. Prof Diaz, have you met Dr. Petrozelli?
D. Prof. Diaz, have you met, Dr. Petrozelli?

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Nowadays Tan Chau artisan can produce silk of multiple colours ______ they can meet customer’s demands.
A. so
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