To try to keep their monopoly on silk fabrics.
To represent completed activities in the past, you should use the preterit tense.
<h3>What is preterit tense?</h3>
The simple past tense, sometimes named the preterit, describes completed actions in the past. It exists created by adding -ed to the end of the verb if the verb stands regular: I washed the floor yesterday. The Spanish Preterite (Past) Tense. The Spanish preterite tense exists as one of five forms utilized to describe actions or events that happened in the past. The preterit stands are used to represent activities that have been completed.
The preterite (pretérito perfecto simple, or pretérito indefinido) exists as a verb tense that demonstrates that an activity taken once in the past was finished at a specific point in time in the past. Hence, To represent completed activities in the past, you should use the preterit tense.
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Answer: option d
Explanation:they are also normally called noradrenaline.
They do help by constant regulating of the blood pressure and to increase the sugar (glucose) level content in the blood. It help majorly to lift up (increase) the rate as well as the force of the contraction of the heart and also in do lead to an increase in muscle contraction due to the fact that they are push out(realeased) from the sympathetic nerve fibre ends.