Which sentence is punctuated correctly?

So to make choice a correct, the semicolon should be a comma. That should help with choices B and C also. Answer C is correct, because there are only 2 ways you can use 'however': at the beginning of a sentence followed by a comma or. :)

By this statement, Robert Putnam meant that the informal social ties promote more efficient bureaucracy than the formal sectors.

Explanation:

In this analogy given by Robert Putnam, he represented the informal social ties with the choral societies and the formal social tie with the health sector.

There is always delay in  processes and activities due to an inefficient bureaucracy in these formal settings. The informal social ties handle bureaucracy  more efficiently than the formal setting