Saving money to buy a new car within a year is an example of a long-term goal, because it is a goal that takes a long time to accomplish and requires several stages in the process. It takes planning and strategy, and the results are not immediate.
The correct answer is - Coincidentally, my oldest sibling, Nate, just turned nineteen.
It is quite easy to spot a subject - just ask the question who. Who just turned nineteen? - My oldest sibling.
The first option is incorrect because the phrase is used as an indirect object. C is incorrect because my brother Nate is the subject, and my oldest sibling is the appositive. D is incorrect because Nate is the subject, and my oldest sibling is predicate nominative.
Magnetic field lines spread out from one pole, curve around the magnet, and return to the other pole.