The answer to the first part of the question is A: an advantageous outcome.
The word fortuitous means: fortunate, lucky, providential, happy. It is usually related to destiny or fate, but also it is related to randomness, so that, combined, it is a providential and felicitous occurrence.
The answer to the second part of the question is A: apart from actual reality.
The word abstract most commonly and accurately refers to an idea of a general, speculative and not concrete nature. In the sentence above, it is used, in a precise way, to differentiate what is actual, concrete and ongoing in Jillian´s life (family and friends), from what is still unforeseeable and speculative (her future).