From the options given below, select the option which states the correct combination of correct sentences.
I. The report highlights several key issues that has been overlooked by the authorities for an extended period of time. 
II. Despite facing numerous challenges, the team managed to complete the project within the stipulated timeframe without compromising on quality. 
III. The manager insisted that all the employees must adhere to the guidelines strictly to maintain discipline in the workplace. 
IV. Rarely do people realizes the importance of financial planning until they encounter unexpected economic difficulties.