B. Diversification into another product market will lower business risk

Diversifying into a different sector can reduce unsystematic (business-specific) risk, as cash flows from different industries may be less correlated.

C. Greater protection from transaction risk

Company A already has B$ exposures (manufacturing and a B$ loan). Acquiring Company B, which operates and earns in B$, can provide B$ inflows that help naturally hedge B$ outflows, reducing transaction risk.

D. Greater protection from translation risk

The acquisition adds net assets in B$, which can act as a balance sheet hedge against existing B$ liabilities (such as the B$ loan). On consolidation, this can reduce the volatility of reported equity due to exchange rate movements, i.e. translation risk.

Option A is weak: political risk in Country B is not reduced by owning more assets there. E is doubtful because Company B is in a different industrial sector, so classic production scale economies are unlikely to be a primary justification.