The coupling between different modules of a software is categorized as follows:
Coupling between modules can be ranked in the order of strongest (least desirable) to weakest (most desirable) as follows:
Coupling between modules can be ranked in the order of strongest to weakest as follows:
Content Coupling $>$ Common Coupling $>$ External Coupling $>$ Control Coupling $>$ Stamp Coupling $>$ Data Coupling
Ranked highest to lowest:
When one module modifies local data values or instructions in another module. (can happen in assembly language)
if one refers to local data in another module.
if one branches into a local label of another.
modules bound together by global data structures.
so, ans A