Modal Verbs show us the attitude of the speaker to what is being said or done. The term 'modal' means expressing mood and mood is a way to express the attitude of the speaker.
Option B is the correct answer because it expresses necessity.
'Will be' is used to refer to actions that will be happening in the future, for which the specific time is unknown. It is used as a helping verb to denote the simple future tense. 'will be also' is grammatically incorrect therefore 'will also be' is the right answer.
There are a few different ways 'among' and 'between' are used. The most common use for 'among' is when something is in or with a group of a few, several, or many things. The most common use of 'between' is when something is in the middle of two things or two groups of things. It is sometimes used in the phrase in between.
When you're talking about the future, 'will' is a very common and simple way of describing what you anticipate or plan to happen. 'will got' is grammatically wrong and therefore 'will get' is the right usage.