In the context of the BCG matrix, which of the following businesses would be classified as a cash cow?

Bigs Steel, a metal manufacturer that has negligible market share in a slow$-$growing industry

Brain Cash, a finance company that is struggling for market share in a fast$-$growing industry

HappyTot, a children's toy company that has been earning steady profits in a slow$-$growing industry

PrimeSmart, a smartphone manufacturer that is the market leader in a rapidly growing industry