What is this suppose to be about. What is the question
The problem in the sentence "James is more smarter than Steven", is option A. Double Comparison. Double comparison happens when we use the word more or less plus the comparative form of an adjective with the suffix -er.
<span>bringing attention to the unchecked use of pesticides, pesticides’ harmful effects on the environment, and writing laws to protect the environment
b.</span>
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Even though you didn't give us the fragment with the comma slice, it isn't really necessary here as we can answer just based on these 4 options here. All options apart from the second one are correct - only the second option doesn't fix the mistake of the comma splice, whereas the other options do but connecting the sentences properly.