Turning away from literary realism to write romantic stories about the peasant life and landscape of northern Sweden, in 1909 Selma Lagerlöf was the novelist who became the first woman and was also the first Swedish writer to win the Nobel Prize for Literature.

A. Turning away from literary realism to write romantic stories about the peasant life and landscape of northern Sweden, in 1909 Selma Lagerlöf was the novelist who became the first woman and was also the first Swedish writer to win
B. She turned away from literary realism and wrote romantic stories about the peasant life and landscape of northern Sweden, and novelist Selma Lagerlöf in 1909 became the first woman as well as the first Swedish writer that won
C. Selma Lagerlöf was a novelist who turned away from literary realism to write romantic stories about the peasant life and landscape of northern Sweden, and in 1909 she became the first woman in addition to the first Swedish writer winning
D. A novelist who turned away from literary realism to write romantic stories about the peasant life and landscape of northern Sweden, Selma Lagerlöf became in 1909 the first woman and also the first Swedish writer to win
E. As a novelist, Selma Lagerlöf turned away from literary realism and wrote romantic stories about the peasant life and landscape of northern Sweden, in 1909 becoming the first woman and also the first Swedish writer that won

In January 1994 an oil barge ran aground off the coast of San Juan, Puerto Rico, leaking its cargo of 750000 gallons into the ocean, while causing the pollution of the city’s beaches.

A) leaking its cargo of 750000 gallons into the ocean, while causing the pollution of
B) with its cargo of its cargo of 750000 gallons leaking into the ocean, and it polluted
C) and its cargo of its cargo of 750000 gallons leaked into the ocean, polluting
D) while it leaked its cargo of 750000 gallons into the ocean and caused the pollution of
E) so that its cargo of 750000 gallons leaked into the ocean, and they were polluting

I got the answers right but i read die OE for the questions which I do not understand as the OE refers to run on sentences which i couldn’t spot. Pls explain the reasons for each answer why to choose or not. Thanks

_________________

vazlkaiye porkalam vazltuthan parkanum.... porkalam maralam porkalthan maruma

can u tell me y u prefer B over D ?
_________________

vazlkaiye porkalam vazltuthan parkanum.... porkalam maralam porkalthan maruma

you are right

OA are

1.) D

2.) C

But can you explain me why B and C at the first sentence create an run on sentence? Same by sentence 2 B creates also a run on sentence. Can you explain me how i can recognize those as a run on?