A $42-$year$-$old single taxpayer with AGI of $$159,000$ a year can make which of the following IRA contributions if they are not covered by a plan at work?

a$.$ $$7,500$ to either a traditional IRA, a Roth IRA, or a nondeductible IRA

b$.$ $$6,500$ to a Roth IRA only

c$.$ $$6,500$ to either a traditional IRA or a nondeductible IRA

d$.$ $$6,500$ to either a traditional IRA, a Roth IRA, or a nondeductible IRA