Which sentence from the article MOST directly raises doubts about the success of these new businesses?


"We do not allow unaccompanied minors on the Lyft platform," said Katie Dally, a Lyft spokeswoman.


He said ride-hailing for children is a "very big niche" that isn't served by other solutions


Shuddle and HopSkipDrive ride fees are higher than Uber's or Lyft's, executives said.


He said that ride-hailing services for children may not make enough money just by transporting kids to be great businesses.