Answer: A. have goods produced at the lowest possible cost.
The language convention that the author used to separate the declarative sentence from the disruptive phrase in this excerpt are em dashes.
The disruptive phrase is everything separated from the rest of the sentence by these dashes - "so called because they used to, like, declare things to be true, okay, as opposed to other things are, like, totally, you know, not." This phrase disrupts the natural flow of the sentence by being randomly embedded in it.
This is true? I think i might be wrong
First off do you mean the game tetris? If so here is the answer:
Tetra is a prefix which means “four” and is used when forming compound words. In tetris, we use pieces (called tetrominos), which are formed by combining 4 small blocks (called minos). There are 7 possible types of tetrominos named after the letters that they resemble: I, O, L, J, T, S, and Z.