Jewish immigrants from Poland, Schwartz’s Deli was opened by Eli and Rivka Schwartz in 1843 after unsuccessfully attempting to find office work.
Jewish immigrants from Poland---Immigrants should refer to people. Here its Eli and Rivka.
A quick scan through the options will help us eliminate all the options except B and E but in E Eli an Rivka opened what?
Hence B is the right answer according to me.
(A) Schwartz’s Deli was opened by Eli and Rivka Schwartz in 1843 after unsuccessfully attempting to find office work
(B) Eli and Rivka Schwartz opened Schwartz’s Deli in 1843, after unsuccessfully attempting to find office work
(C) after unsuccessfully attempting to find office work, Schwartz’s Deli was opened by Eli and Rivka Schwartz in 1843
(D) Schwartz’s Deli was opened in 1843 by Eli and Rivka Schwartz after unsuccessfully attempting to find office work
(E) Eli and Rivka Schwartz opened after unsuccessfully attempting to find office work Schwartz’s Deli in 1843