Have proper posture which will minimize your chance of being hurt if the need arises for your to help the one for whom you're spotting the exercise.
Moreover, it's also important that you pay close attention to the person you're spotting to see and check if he or she will need help anytime soon to be spotted or not. This is something many spotters can miss and is at the same time a crucial aspect of spotting.
I think c would be the answer
Watching/looking out for the early syntoms.
What is the difference between formal and informal language?
Formal and informal language serve different purposes. The tone, the choice of words and the way the words are put together vary between the two styles. Formal language is less personal than informal language. It is used when writing for professional or academic purposes like university assignments. Formal language does not use colloquialisms, contractions or first person pronouns such as ‘I’ or ‘We’.
Informal language is more casual and spontaneous.
