Question

hint most act english questions can be answered by looking at the referenced sentence without reading the whole passage
question 1/5
this question refers to
choose the option that best improves the underlined portion of the sentence.
a no change
b there
c its
d theyre
print your own equipment
the \maker movement\ is a technology - oriented extension of the traditional \do - it - yourself (diy)\ movement. the maker movement often involves specific pursuits in electronics, cnc (computer numerical control) tools such as mills and laser cutters, and 3 - d printing and related technologies.
3 - d (three - dimensional) printing uses technology to generate three - dimensional objects from raw materials based on computer models. most consumer - oriented 3 - d printers print in plastic by melting a strand of raw material at the tip (\hot - end\) and \drawing\ a 3 - d object in layers. many variations of 3 - d printers exist, including those based on laser - polymerization or fusion of resins or powdered raw materials (e.g., metal or ceramic printers).
applications of 3 - d printing technologies have become as diverse as the types of materials that can be used for printing. replacement parts at the international space

Explanation:

La frase original es gramaticalmente correcta y no requiere cambios. "There" se utiliza como un sustantivo neutro para introducir una frase o una idea, "its" es el posesivo de "it" y "they're" es la contracción de "they are", ninguno de estos opciones es adecuado en el contexto de la frase original.

Answer:

A. NO CHANGE