The Chief Information Security Officer $($CISO$)$ for a regional textile company tasks a cyber team with reviewing the security implications on available cloud architecture models as the business anticipates transitioning to a cloud environment within the next year. What model offers the highest level of security and allows the individual customer to have complete control over the infrastructure?

a$.$

Single$-$tenant architecture

b$.$

Hybrid architecture

c$.$

Serverless architecture

d$.$

Multi$-$tenant architecture