Select the most appropriate option that can substitute the highlighted words in the following sentence.
The health-care system is in transition at those moment.

Correct option is B

The correct substitution of the highlighted phrase is “at the moment.”
Explanation: “At the moment” is a standard time expression used to describe current time. The phrase “those moment” is grammatically incorrect and awkward.
Grammatical rule used: Time expressions such as “at the moment,” “at present,” or “currently” are used to indicate present continuous situations.
Example: She is not available at the moment.
�� Information Booster:
✔ Use "at the moment" for present context.
✔ Don’t pluralize “moment” when using such fixed expressions.