Company A and B are both large US$-$based enterprises. Company A has been entirely domestic throughout its long existence, and has very successfully operated in the US$,$ one of the largest and most sophisticated markets in the world in that industry. Company B has had productive operations and also significant sales all over the world since its inception, and for decades has been successful in both the US and in $50$ countries across $6$ continents. Company B$\text{'}$s presence in the US is$,$ however, much smaller than Company A$\text{'}$s$.$ Between the two companies, it is safe to assume that:

Company A faces, in a day to day basis, greatest complexity and challenges to compete and to operate than Company B

Company C$,$ a multinational from Belgium with operations across $5$ continents, but not in the US$,$ faces much smaller complexity and challenges to compete and to operate than Company $A,$ because Company A has to operate daily in the highly sophisticated US market

Company B faces, in a day to day basis, greatest complexity and challenges to compete and to operate than Company A

Company A and B face similar challenges, as they are both in the US and they both face great complexity in the highly sophisticated US market.