Correct answer: B) Logistic
There are four growth phases which are observed in bacteria, these are lag phase, log phase or exponential phase and death phase.
Lag phase is the period when bacteria is adjusting to the environment, under this phase bacteria is adopting to the new environment and preparing essential enzymes which are necessary for the growth.
In the log phase, the bacterial population grow in a logarithmic fashion. As the bacteria grow, the bacteria consumes all the available nutrients and produce waste products.
When the nutrient supply is depleted, and because of release of toxic waste product the growth rate enters a stationary phase in which the number of viable bacteria cells stars depleting which will lead to a death phase.