To convict a person of a conspiracy, $\_\_\_\_\_\_\_\_\_\_.$

Question $22$ options:

a$)$

a formal agreement must exist between all members

b$)$

all members must plan all details of the scheme

c$)$

only one person plans and commit the crime

d$)$

two or more people must be involved in the accomplishment of a common and unlawful plan

e$)$

the victim must prove damages suffered due to the act of two or more individuals