Complex sentence: The song was released in the United States in February 1984 and became the band's highest charting single there, peaking at number three on the "Billboard" Hot 100 in May, remaining on the chart for 21 weeks.
Split into simpler sentences: The song was released in the United States in February 1984. It became the band's highest charting single, peaking at number three on the "Billboard" Hot 100 in May, and remained in the chart for 21 weeks.