how to view only readings of a selected data from a column while the other columns remain

Hi Friends

I am new here and have a problem 

  Year       Market         Winner          BID
1  1990        ABC             Apple          0.1260
2  1990        ABC             Apple         0.1395
3  1990        EFG             Pear           0.1350
4  1991        EFG             Apple         0.1113
5  1991        EFG            Orange          0.1094


For each year and separately for the two markets (i.e.,ABC,EFG), examine the
combined data for Apple and Pear on the bid price variable BID for presence
of potential outliers.5 Identify instances where you observe the presence of
potential outliers.

I managed to separate the data by year only

y <- c(1, seq(300))

year1991 <- subset(X, y < 39)
year1991

Year1991 <- year1991[, c(1,2,3,5)]

Year1991

now I need help on whats the right R command to key to select(View) only ABC
of the Market COLUMN, which the other column values remains.

Is it possible to do multiple  separation at one time? or step by step

Kindly advise :)



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