Critical-thinking instruction is predicated on two assumptions: that there are clearly identifiable thinking skills that students can be taught to recognize and apply appropriately, that if students recognize and apply these skills, they will become more effective thinkers.
Explanation:
This is an example of the use of first conditional, the first conditional statements follow the rule where they connect two independent sentences the if-clause and the main clause, the if clause rule is " if+ present simple sentence" while the main clause is a future tense sentence, they can be connected by a comma as long as the if clause comes first, otherwise, the comma will not be necessary, this rules lead to select option E as te correct revision of the sentence.
"Andrew says this because he had been able to keep his promise given to Joe Morgan; he had been able to save Mrs. Morgan as well as his newly born baby after it had been born lifeless. It means Andrew felt contented and jubilant at his own efforts and the achievement."
