As principal of westbank senior high school, i certify that these seniors have met all of the requirements set forth by the oceanview county public schools and the state of florida. by the power vested in me, i hereby declare the class of 2011 to be graduates of westbank senior high school.

which phrase most strongly illustrates the formal tone of the statement?

a) the state of florida
b) have met all of the requirements
c) as the principal of westbank senior high school
d) i hereby declare