Now firstly, the question mentions the following :
Local news outlet only have handful of reporters
Infrastructure required to cover breaking stories - is costly
Local outlets cannot compete with large national conglomerates on breaking news
Hence local outlets needs to focus on hyperlocal investigative journalism - sustained community relationships, not large infrastructure since -----
So we need to complete the last sentence
Option A - The cost of manufacturing foreign correspondents and wire subscriptions has risen sharply over the past decade - this seems incorrect - We need to find the reason for hyperlocal investigative journalism.
Option B - Local outlets are better positioned than national conglomerates to cultivate community trust that such journalism supports - this seems correct - it is related to the hyperlocal investigative journalism - let's check for other options as well
Option C - residents of a community are most likely to share sensitive information with journalists they have come to know personally over many years - this is false since if the local community have known journalists of national conglomorates than they can share the information to them and not local journalist.
Option D - National media congolmerates have recently begun launching community outreach initiates aimed at strengthening their ties with local audiences - this does not provide completion to the statement rather it mentions that their competion will increase. So this is also incorrect
Option E - investigative stories focusing on local institutions have repeatedly proven capable of attracting national attention and significant advertising revenue - this also seems correct since it mentions why doing hyperlocal journalism will be beneficial
Between Option B and Option E - I choose Option B since it provides better reason to chose hyperlocal stories rather than Option E which just mentions that revenue will be increased.