(Pascal 2023, Part A, Question 8, CEMC - UWaterloo)

A sign has $31$ spaces on a single line.
The word RHOMBUS is written from left to right in $7$ consecutive spaces.
There is an equal number of empty spaces on each side of the word.
Counting from the left, in what space number should the letter R be put?
$(A)$ $12$
$(B)$ $13$
$(C)$ $14$
$(D)$ $15$
$(E)$ $16$

Answer Submission Note(s)
Your answer should be a single capital letter, e.g. 'A'.