C is not correct since in the case of circuits that are lined up in series, if one or them dies they all die.
She could volenteer at a day care at the weekend or study child development/care whilst she is still at school.
is a collection of information stored under a single name.

Answer:
A. Sequential
Explanation:
As the page and the presentation goes on, the author will put it in that order or link it to a small number such as ²