I think its D,But thats my Answer.
Answer: didn't he?
Explanation:
"He scored the highest, didn't he?" Since the question is positive, the tag should be negative.
Answer:
An open system is defined as a “system in exchange of matter with its environment, presenting import and export, building-up and breaking-down of its material components.” Closed systems, on the other hand, are held to be isolated from their environment.
Explanation:
The answer is: [D]: "higher" .
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Note:
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Choice: [A]: "more high"; — is grammatically incorrect at all costs.
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Choice: [B]: "highest" ; — is the "superlative" — NOT the "comparative".
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Choice: [C]: "more higher"; — is grammatically incorrect at all costs.
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Choice: [D]: "higher" — is the comparative form and is grammatically correct.
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