Which is the correct syntax for opening a file in Python?

a$.$ my$\_$file $=$ readlines $(\text{'}$Wikipedia$\_$data.txt$\text{'})$

b$.$my$\_$file $=$ read$(\text{'}$Wikipedia$\_$data.txt$\text{'})$

c$.$ my$\_$file $=$ open $(\text{'}$Wikipedia$\_$data.txt$\text{'})$

d$.$my$\_$file $=$ open$\_$text $(\text{'}$Wikipedia$\_$data.txt$\text{'})$