GMAT Test Prep: SC-71255526 GMAT Sentence Correction | TOEFL IELTS GMAT GRE SAT ACT PTE ESL

A a reasonably clear picture has emerged of the patterns and causes of ocean currents

B a reasonably clear picture of the patterns of ocean currents and their causes have emerged

C a reasonably clear picture emerged of ocean currents, their patterns and the causes of them

D there have emerged a reasonably clear picture of the patterns of ocean currents and what caused them

E there had emerged a reasonably clear picture of the patterns of ocean currents and their causes