Answer:
b. outstanding shares plus treasury shares.
Explanation:
The issued stock is a combination of the outstanding shares and the treasury shares
The treasury shares are those shares that are bought back by the issuing company. It is not considered for computing the earning per share or dividend per share as only outstanding shares are relevant for this computation.
And, the outstanding shares are those shares which are currently held by the shareholders
So, it is a mix of outstanding shares and the treasury shares