(Choose the letter corresponding to the correct structure from the drop-down list provided.)

Correct Structure (A, B, C)?:

Assign signal number 3 (indicated as a red number on the spectrum above) to its corresponding hydrogen(s) (shown as a red lower-case letter on the structure above).

(Write the letter of the hydrogen (or set of equivalent hydrogens) in the box provided, e.g., a)

Signal number 3 corresponds to hydrogen(s):

Shown below is the 1HNMR spectrum of a compound with the formula C5H10O2. Choose from the constitutional isomers below to assign a structure to this spectrum