The answer is B: doubting
Simply put, students with good study habits achieve better grades and are more successful in their classes.
If the sentence in question is a statement (ends with a period), I would probably "however" as your transition word.
Answer:
It's either A or D but I'm leaning more towards A.
Explanation:
The answer is C. Whenever we come to grass that can be mowed, Mr. Frink has the men cut a good supply of it with the scynthe...
It was Mr. Frink plan to remain here until enough of the coarse grass had been cut and cured into hay to feed our horses across the desert.