11) A & C
A – Correct
A is obviously one of the correct options as it directly states that cancer treatments require shorter stays.
B – Wrong
B just says that number of episodes or cases is twice that for cancer. However, it does not say anything about the stay of each of those episodes.
C – Correct
C says that circulatory system diseases require longer stays which is directly relevant to the question
D – Wrong
is irrelevant as death is not a factor which relates to stay