For e.g.: He set aside his concerns and allowed his child to go on the field trip.

Hence, option C is the correct answer.

For example, the autonomous regions have an incentive to hang together.

Hence, option D is the correct answer.

For example, after 14 years living and working in this country, she thinks it's time to call it a day.

Hence, option A is the correct answer.

The idiom “At one’s wits end” means completely confused, not knowing what to do

E.g. I am at my wits’ end . I don’t know how to help him.

Hence option B is the correct answer.

If someone is or feels under the weather, they feel ill.

For example, I'm feeling a bit under the weather - I think I'm getting a cold.

Hence, option B is the correct answer.

The meanings of the words are:

Cardiologist: a doctor who specializes in the study or treatment of heart diseases and heart abnormalities.

Dermatologist: a medical practitioner qualified to diagnose and treat skin disorders.

Radiologist: a person who uses X-rays or other high-energy radiation, especially a doctor specializing in radiology.

Gynecologist: a physician or surgeon qualified to practise in gynaecology.

Hence, option B is the correct answer.

For example, scientists and doctors alike have jumped on the bandwagon.

Hence, option A is the correct answer.

The idiom 'to take stock of' means 'to carefully think about something in order to make a decision about what to do next'.

For example, we need to take stock and formulate a plan.

Hence, option B is the correct answer.

The idiom “Make one’s mark” means to succeed or achieve recognition

Example : To make your mark in Bollywood is a hard task.

Hence, option D is the correct answer.

The idiom “Rise to the occasion” means to make the special effort that is required to successfully deal with a difficult situation

For example : When it comes to the finals , they can rise to the occasion.

Hence ,option A is the correct answer.