Answer:
A. -many substitute
Explanation:
Deadweight loss is inefficiency that occurs as a result of taxation. It's the change in production or consumption as a result of tax.
If tax is imposed on a good with many substitutes, the deadweight loss would be greater because consumers can easily shift consumption to another good that is cheaper.
If a good has inelastic supply or demand, the deadweight loss is less because consumers and producers do not change quantity demanded and supplied if prices increase as a result of tax.
I hope my answer helps you.