Answer:
A. Vasily is not correct. He should have rewritten the original expression as −6(−5g−7h+9) and then as 30g+42h−54.
Explanation:
Given the expression;

Rearranging the above, we have;

Simplifying, we have;

Multiply, to open the bracket;

Therefore, Vasily should have rewritten the original expression as −6(−5g−7h+9) and then as 30g+42h−54.