from December $31,2023,$ to December $31,2024,$ a company's Accumulated Foreign Currency Translation Adjustments changed from a debit balance of $$9,780$ to a debit balance of $$8,957.$ Such changes indicate what?

a$.$ overall, the US dollar weakened $($versus foreign currencies used by the company's foreign subsidiaries$)$

b$.$ overall, the US dollar strengthened $($versus foreign currencies used by the company's foreign subsidiaries$)$

c$.$ the company's foreign subsidiaries reported significant operating losses d$.$ the company's income statements reflected a multi$-$billion foreign currency transaction loss