Multi-select problem: How does the next paragraph end?

How to buy a remote starter for an suv
Choose a single-or multiple-button starter
Single-button remote car starters function solely to start the suv when you're not in it. These starters are less expensive and inexpensive to have installed. Multiple-button car starters start your suv and can lock and unlock doors.

Choose your answer from:
[a]. Some multiple-button starters are equipped to turn on window defrosters and seat warmers. These are more expensive than single-button starters and are more prone to technical problems, but provide a higher level of convenience.
[b]. Different departments may have different models of vehicles to use, such as those included in a vehicle registration range. These models have features like automatic electric starters, additional modern valves, and inner shifting gears.
[c]. It also only loads multiple-button engines. V2 is not a single-button starter.
[d]. Both models are often available when you need a second tip. If you use single-button starter starters, the remote starter will not have a better configuration.
[a].