Which of the following is true concerning stretching techniques?
a. ballistic stretching exercises never involve bouncing.
b. you should always stretch before warming up.
c. ballistic stretching exercises can be harmful if done incorrectly.
d. not all ballistic stretches require supervision.

Ballistic stretching exercises can be harmful if done incorrectly

Explanation:

Stretching is an exercise done to improve posture and to prevent injuries from occurring during physical activity. However, as with any physical activity, if done incorrectly, stretching can be detrimental to health. Therefore, it is necessary to obtain guidance from a physical education professional, who will indicate the best exercises for each person and explain how each exercise should be performed.

Its C

Explanation:

chronological thinking is an indispensable tool to structure a historical narrative and to give meaning to a sequence of events. the final section presents the results of a survey to test the chronological thinking of lower secondary school students carried out by the educational research institute.