An Opinion Poll Is Conducted Among a State's Electorate to Determine

An opinion poll is conducted among a state's electorate to determine the relationship between their income levels and their stands on a proposition aimed at reducing state income taxes. Voters are classified as belonging to either the low-, middle-, or upper-income group. They are asked whether they favor, oppose, or are undecided about the proposition. Let the letters L, M, and U represent the low-, middle-, and upper-income groups, respectively, and let the letters f, o, and u represent the responses - favor, oppose, and undecided, respectively. ​
Describe the event E that a respondent does not oppose the proposition and does not belong to the upper-income group.
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A) E = {(L,o) , (L,u) , (L,f) , (M,o) , (M,u) , (M,f) , (U,o) , (U,u) }
B) E = {(L,f) , (L,u) , (M,f) , (M,u) }
C) E = {(L,f) , (M,f) , (U,o) , (U,u) }
D) E = {(L,o) , (L,u) , (L,f) , (M,o) , (M,u) , (M,f) }
E) E = {(L,o) , (L,u) , (M,o) , (M,u) , (U,f) }