Which method would you use to determine whether a certain substring is present in a string?

a$.$ endswith$($substring$)$

b$.$ find$($substring$)$

c$.$ replace$($string$,$ substring$)$

d$.$ startswith$($substring$)$

Analyze the following code:

$x=5^{**}[0]$

for $i$ in range$(0,$ len $(x))$:

$x[i]i$

$pr{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}(x[i])$

A$.$ The program displays $01234.$

B$.$ The program has a syntax error because $i$ is not defined in the last statement.

C$.$ The program displays $4.$

D$.$ The program has an error because the last statement causes index out of bounds exception.

Suppose numbers $=10**[0],$ what is numbers $0?$

A$.10$

B$.$ undefined.

C$.0$

D$.$ None

Suppose list$1$ is $["$red$",$ "green", "yellow", "green"$],$ what is list$1$ after list$1.$sort$()?$

A$.["$red$",$ "green", "yellow"$]$

B$.["$green$",$ "yellow", "green"$]$

C$.["$red$",$ "green", "yellow", "green"$]$

D$.["$green$",$ "green", "red", "yellow"$]$