Correct Answer: (d) are habituated
Solution:Are habituated Gerund(Having' in the given sentence) is used after the phrase be habituated to: We use Simple Present Tense to state a fact or universal truth. Similarly, the given passage states a fact about children. Pusal dens He wil be used according to the plural subject 78% students'. Hence, 'are habituated' is the most
appropriate answer.