The$$ pay$-$as$-$you$-$go withholding was needed in $1943$ to allow taxpayers to make tax payments when they had available cash flow.$$ Pay$-$as$-$you$-$go permitted the taxpayer to postpone making payments for up to a year.

B$.$

The$$ pay$-$as$-$you$-$go withholding was needed in $1943$ to avoid significant tax cash flow problems to the tax paying public as the tax base broadened from$6\%$ of the population in $1939$ to$74\%$ in $1945.$ Pay$-$as$-$you$-$go prohibited the federal government from deducting taxes directly out of an$$ employee's wages.

C$.$

The$$ pay$-$as$-$you$-$go withholding was needed in $1943$ to allow taxpayers to make tax payments when they had available cash flow.$$ Pay$-$as$-$you$-$go prohibited the federal government from deducting taxes directly out of an$$ employee's wages.

D$.$

The$$ pay$-$as$-$you$-$go withholding was needed in $1943$ to avoid significant tax collection problems as the tax base broadened from$6\%$ of the population in $1939$ to$74\%$ in $1945.$ Pay$-$as$-$you$-$go permitted the federal government to deduct taxes directly out of an$$ employee's wages.