Which of the following operations will rightly modify the value of the element? ( )

A、
s='hello'
s[0]='H'
B、
t=('h','e','l','l','o')
t[0]='H'
C、
t={'h','e','l','l','o'}
t[0]='H'
D、
t=['h','e','l','l','o']
t[0]='H'