I feel like this is conditional but I'm not too sure, I would go with A because it is a perfect past tense while D is simple past tense (I would use D is normal conversation though)
D would be like answering a question "what did you do last night?" "I went to bed two hours before it started raining"
A is like you're telling someone what you have already done using active voice "I had gone to bed two hours before it started raining"
Take what you will from this, my friend. Sorry I can't be more of a help
Answer:
Science has discovered that sub-concussive blows to the head are causing as much neurological damage as a full on concussion. ... The discovery of this knowledge brought a new light to how even though athletes are not showing signs of full blown concussions, the average hits they take on are causing repetitive damage.
Explanation:
hope it helps! :))
Answer:
The skeletal system is the body system composed of bones and cartilage and performs the following critical functions for the human body:
supports the body.
facilitates movement.
protects internal organs.
produces blood cells.
stores and releases minerals and fat.
A. he would encourage Anne to help around the house
Natural changes to the ecosystem refer to environmental phenomenon that occur naturally. Natural changes include floods, volcanic activity, hurricanes, droughts, and earthquakes. They can be destructive, but they also have advantages.
The benefit of the flood is for example providing nutrients to the soil that were lacking. Also t<span>here may be relocation of fishes and organisms living in water bodies, which improves the ecosystem.
Volcano threatens t</span>he people and animals in the area are threatened, but is has also some advantages, for example:<span>the soil becomes rich due to the nutrients from the volcano.
</span>Hurricanes result in the destruction to infrastructure and loss of lives, vegetation, and livestock. The advantage is that it lowers the temperature and t<span>he wind will cause the topsoil to be distributed to areas in which it was lacking.</span>
