What is the minimum blood content of a controlled substance that is considered proof of Operating a Motor Vehicle While Intoxicated in Indiana?

Select one:

a$.0\mathrm{.}09$ percent BAC with enhanced penalties at $0\mathrm{.}14$ percent BAC

b$.$ There is no minimum level; the presence of any amount of a controlled substance in a blood sample can be considered proof of OWI in Indiana

c$.0\mathrm{.}20$ percent BAC

d$.$ OWI in Indiana only refers to alcohol and does not apply when a controlled substance is involved