Let me give you the best in this series... here it goes.. btw after this im not sure what is correct... guys can someone correctly and foronce and for all summarize this rule... this can be a pain on the day for sure...
As a result of surging economic indicators, most analysts upgraded thre company's stock to a strong "buy" ignoring the advice of the head of a watchdog organization who warned that the company's product would prove not only dangerous but ineffective in the long run.
A. who warned that the company's product would prove not only dangerous but
B. warning that the company's product would prove not only dangerous and also
C. Warning that the company's product would prove itself to be both dangerous and
D who warned that the company's product would prove to be both dangerous and
E. who was warning that the company's product would prove not only dangerous but
https://www.beatthegmat.com/economic-ind ... tml#165802