Which of the following is an analytical thesis?

a. millions of illegal immigrants are bankrupting u. s. institutions and should be deported immediately.
b. the best approach to containing the surge in illegal immigration is to hold employers accountable for hiring non-documented workers.
c. surges in illegal immigration pose a number of significant challenges to the united states' institutions such as public schools, housing, and healthcare.
d. u. s. taxpayers should not bear the burden of providing for the education, housing and healthcare of millions of illegal workers.