The first alternative is correct (A).
Stretching is a way to stimulate the muscles and ligaments of the human body to improve posture, breathing and pre-disposition of people. Several activities are part of stretching, such as correct breath control, the time each session should last, and the natural discomfort. However, bounceing the body is not part of stretching practices, it is part of some aerobic activities.
<span>The upper right-hand corner of the note-card contains the source information.
Typically it contains the name of the author and/ or the page number where the information on the card was found. Sometimes if you're also using source cards, the upper right-hand corner will contain a source number so that you can reference your source card for the necessary information. The top of the note-card should be titled with the topic the information will address or support. </span>
A. While driving to work this morning, I passed a car accident at the corner of Elm and Juniper
C. Through Gregor's transformation into a hideous bug