Scientific knowledge A.
was modified regularly early in human history, but it can no longer be modified.

B.
must be modified by popular vote from the general public.

C.
cannot be modified, even if new information challenges prevailing theories.

D.
can be modified as new information challenges prevailing theories.

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.