The correct answer is D. No error.
The sentence “You will get all the information if you read this booklet carefully” is grammatically correct. The subject “you” agrees with the verb “will get,” and the object “all the information” is correctly placed after the verb. The phrase “if you read this booklet carefully” is a subordinate clause that modifies the verb “will get.”
The other options are incorrect because they contain grammatical errors. Option A, “You will get,” is incorrect because it does not include the object “all the information.” Option B, “all the information,” is incorrect because it is not preceded by a verb. Option C, “if you read this booklet carefully,” is incorrect because it is not a complete sentence.