So it turns out after selecting your three choices: I did (1) Rock'n'Roller Coaster (2) ToyStory Mania (3) Fantasmic! for Sunday August 4th at Hollywood Studios. (Reason: we did not get a chance to see Fantasmic! last year)
And I was given 4 Options, (A,B,C,D) with different times and orders created. It seems like option A is the "Morning people", option A gave me window to R'n'R at 9am-10am, a window to Indiana Jones at 10:45am-11:45am, and a window to ToyStory Mania at 12:15-1:15pm. (It seems like it has an auto-replace due to my Fantasmic FP+ at 8:25pm, to sum in conclusion, it seems like each option contains only about 4 hour window for your 3-FP+). For example option A is from 9am to 1pm. Option B is from 1:20pm to 5:10pm. Option C and D are closely related from 4:00(or 5:00pm) to 9:00pm. With that said, options A and B were not going to give me Fantasmic, due to its late show time.
This is just data analyzed from one day only, it turns out that Options A and B were not going to give me a FP+ to Fantasmic! while options C and D were going to give me Fantasmic.
It is disappointing because, what if I liked the times offered in option A for R'n'R and ToyStory, but was not given a FP+ to Fantasmic. I guess Option C or D is going to my choice.
Currently I selected R'n'R and ToyStory Mania FP+ later in the evening. Option C: is R'n'R at 5:40p-6:40pm, ToyStory at 7:25-8:25p, and lastly Fantasmic! with a window of 8:25p-8:50pm. Option D is the same as C, but just that it had an earlier FP+ for R'n'R at 4:25p-5:25p.
I will plan this day as maybe going to another park, say Epcot in the morning, or MK or AK, and in the afternoon perhaps get the shuttle back to Hollywood Studios to get my FP+ for those selected times. Perhaps this is easier for me to plan out since I have the parkhopper tickets.