When members of a hospital council governing body solicit and receive assistance from architects on a building project, they could be convicted of .

Kickbacks.

Explanation:

As per the given description, the members of the hospital council could be convicted under the charges of 'kickbacks' as they've been misappropriating the hospital funds to seek personal benefits(from the architects). 'Kickbacks' are basically described as 'a clandestine payment that is made in return for favor illegally. Therefore, the members of the hospital council are providing a proportion of hospital funds to the architects in return for personal favors from them. Thus, they could be sued and convicted against this 'kickback'.  

d. the polar jet stream   lies between the polar easterlies and trade winds should be your answer