Given the following data frame:

$```$

df data.frame$($

name $=$ c$("$Alice$",$ "Bob", "Charlie"$),$

age $=$ c$(25,30,35),$

score $=$ c$(90,85,88)$

$)$

$```$

What would you run to add a new column called "grade" to the data frame with all values set to $"$F$"?$ Select all that apply.

df cbind $($df$,$ grade $="$F$")$

df$[,$"grade"F$"$

df$\backslash$$grade F$"$

df rbind$($df$,$ grade $="$F$")$

$($Hi$,$ I tried to run it in R$,$ but I$\text{'}$m a very novice learner so I don't know if I$\text{'}$m using it right. I also don't know if we're supposed to figure it out by running the code, or just from looking at it$.$ So if a person can figure it out just by looking at the multiple choice options, what should I look for? I've been combing through my notes but can't find what I need. I$\text{'}$m still trying to learn how to apply specific instructions for coding to a specific question to other scenarios$)$