I wanna go with C., but I may be wrong.
It causes a little confusion to have that "Blank Space" right after the the main verb "expect" because we cannot be sure that it represents that a blank or a space is that follows, or that Blank Space is used as a noun.
To answer this question I will assume that blank space represents that a line goes there to be filled.
By doing so, the correct sentence would be:
Joel and Lucy expect _their_ Halloween party to be really scary!
So the final answer is:
Their
The possessive third person plural pronoun is the best option.
One of the major problems that the publishers are facing in the current internet age is that people, especially students, no longer opted to open hard copies or even soft copies of book. We are more inclined to finding easier solutions in the internet.
Understanding the internal strengths and weakness of the publishing business will allow the company to accordingly adopt to the given situation.
Hi,
The answer should be ‘thesaurus’.