When was the fourth game in the original Mega Man series released in the U.S.?
1992
1987
1987
1987
1987
1987
1987
1987
1987
1987
1986
1991
1987
1986
1991
1987
1986
1990
1991
1987
1986
1990
1991
1987
1986
1992
1990
1991
1987
1986
1992
1990
1991
1987
1986
1992
1990
1991
1987
1986
1992
1990
1991
1987
1983
1986
1992
1990
1991
1987
1983
1986
1992
1990
1991
1987
1983
1986
November 21, 1987
November 23, 1987
1988
1992
1990
1991
1987
1983
1986
November 17, 1987
1988
1992
1990
1991
1989
1983
1985
1986
November 9, 1987
1988
1992
1990
1991
1989
1983
November 28, 1987
1985
1986
1988
1992
1990
1991
1989
1983
1995
1985
1986
1994
1988
1992
1990
November 13, 1987
1991
1989
November 21, 1987
November 23, 1987
1983
1995
1985
November 11, 1987
1986
1994
1988
1992
1990
1991
1989
November 17, 1987
1983
1995
1985
November 21, 1991
1986
1994
1988
1992
1990
1991
1989
November 9, 1987
1984
1983
1995
1985
1986
November 21, 1986
1994
November 28, 1987
1988
1992
1990
1991
1993
1989
1984
1983
November 11, 1991
1995
1985
November 21, 1991
1986
1994
1988
1992
1990
1991
November 21, 1986
1993
1989
1984
1983
November 21, 1992
1995
1985
1986
November 13, 1987
1994
November 21, 1987
November 23, 1987
November 11, 1987
1988
1992
1982
1990
November 21, 1991
1991
1993
1989
1996
1984
1983
1995
1985
November 21, 1986
1994
November 17, 1987
November 21, 1992
1988
1992
1982
1990
November 21, 1990
1993
1989
1996
1984
1983
1995
1985
November 9, 1987
November 11, 1991
September 13, 1990
November 21, 1986