19. Nobel Prize winner Paul Krugman tried to compare the current depression _____ earlier global depressions.
(A)at 
(B)by 
(C)with 
(D)in

A 與 B 相比：compare A to / with B

ex: I hate that my mom compares me to / with my brother every time.

A 被與 B 比較：A be compared to / with B

ex: Life in a suburban area is often compared to / with that in an urban area.

將 A 比擬、比喻成 B：compare A to B

ex: People sometimes compare walking under the sun to staying in an oven.

資料來源：https://www.hopenglish.com/happiness-equation-u-i-r-2

因此本題目：

現在的全球蕭條 the current depression

早期的全球蕭條 earlier global depressions

兩個相比較，因此符合「A 與 B 相比」情況，後面+to/with。

諾貝爾獎獲得者保羅·克魯格曼（Paul Krugman）試圖將當前的蕭條與早期的全球蕭條進行比較。