Answer:
Option b , c and d are the part of the expression .
Explanation:
We are given that the number of pages she has left to read is 276 - 35d
d represents the number of days she has been reading.
276 denotes the total number of pages
35 pages denotes the number of pages read per day
35 d represents the number of pages she has read during d days
276 - 35d represents teh reamining pages
So, Option b , c and d are the part of the expression .