Final answer:
Harburg intended to write an uplifting song in response to the prevailing desire for escapism and comfort during the Great Depression.
Step-by-step explanation:
The kind of song Harburg wanted to write was b) An uplifting one. The Great Depression was a time when people sought escapism in popular culture and media that reminded them of happier times. Songs from this era like "Happy Days are Here Again" and the films that featured the charming antics of stars like the Marx Brothers or Shirley Temple served to lift spirits and provide solace. Harburg, being a songwriter and lyricist, would likely have been influenced by this desire to create art that provided emotional uplift and hope during challenging times.