The correct answer is option (A):
he would considers them properly
The correct answer is "he should consider it properly."
Let's break down why this is the best choice and why the other options are incorrect.
The original sentence's error lies in the phrase "consider than properly." The verb "consider" needs a direct object (what is being considered) and the proper adverb to describe how it's being considered. The word "than" is incorrect.
"He should consider it properly" is the most grammatically sound and logical replacement.
* "He" is the subject, and "should consider" is the correct verb phrase using the helping verb "should" to express a suggestion.
* "It" is the correct pronoun referring to "his intention." We are asking him to consider his intention.
* "Properly" is the correct adverb modifying "consider", describing how he should consider his intention.
Now, let's examine why the other options are incorrect:
* "he would considers them properly" - "Would" is incorrect because it changes the meaning from a suggestion to an action that could have happened. Also, "considers" should be in the subjunctive, not "would considers".
* "he should conside" them properly" - The verb "consider" is misspelled, missing the "r."
* "he considers them properly" - This implies that he currently *does* consider them, not that he *should.* This lacks the nuance of a suggestion that the original sentence intended.