The computer "mouse" was invented in the mid-1960s by Douglas Engelbart. Engelbart's original mouse was housed in a wooden box that had three buttons on top and two wheels on its underside, but the
principle was the same as that of the modern mouse. Unfortunately for Engelbart's bank account, demand
for the mouse did not become widespread until the launch of the Apple Macintosh personal computer in
1984—by which time Engelbart's patent had expired.
Question
The passage suggests that Douglas Engelbart
O made relatively little money from his invention
O worked for Apple computers in the 1980s
was not granted the proper patent for his work
O called the mouse by a different name

made relatively little money from his invention

Explanation:

The passage explains the invention of the computer device, mouse, by Douglas Engelbart.

We can learn from the text that the mouse was not instantly popular. Only around 20 years later it was started to be used globally with computers. By that time, Engelbart’s patent expired, meaning he did not earn any money from sales and usage of the mouse.

Because of this, as well as the line “unfortunately for Engelbart's bank account”, we can conclude that the passage tries to point out the fact that Douglas Englebart did not make much money from his invention, despite it being so widely popular today.

one context clue that me find the meaning of luxuriance was that the base word of luxuriance is luxury, so i think that luxuriance means something that is luxury, or something luxurious.