In his laws of motion, which now form the core of classical mechanics, Isaac Newton clearly and concisely introduced three important physical ideas: the concept of inertia, the relationship between force and acceleration, and the coupled nature of forces.

A] three important physical ideas: the concept of inertia, the relationship between force and acceleration, and the coupled nature of forces

B] three important physical ideas; the concept of inertia, the relationship between force and acceleration, and that forces were coupled in nature

C] three important physical ideas; the concept of inertia, force and acceleration were related, and the coupled nature of forces.

D] three important physical ideas, the concept of inertia, the relationship between force and acceleration, and he also introduced the coupled nature of forces.

E] three important ideas that were physical in nature: the concept of inertia, the relationship between force and acceleration, and the coupled nature of forces.

[spoiler]
The OA is A itself...[/spoiler]

quite an easy question, something that you see in regular English...

E can be chosen but option E is wordy and not concise to use 'that were physical in nature'.

A colon is used when identifying objects or listing things. It makes things more clear and easy to define...\


I hope this question helps to learn something from the other pattern of the GMAT...