Say a researcher needs you to read in a CSV file $(.$csv$,$ similar to what you open in Excel, a $2$D table in a comma$-$delimited format$)$ and a text file $(.$txt$)$ of data from an experiment to use in analysis in R$.$ What $2$ functions could you use to read in a CSV and a text file respectively in R$?$ Order of answers chosen doesn't matter, but only $1$ function should be chosen to handle CSVs and $1$ should be chosen to handle text files.

file.choose$()$

read.csv$()$

read.table$()$

data.frame$()$