Please make sure that you have extracted the files before you access it. You may follow the steps below for extracting the file: 

1. Right-click on the downloaded file

2. Click Extract Here

3. Click the Extract button

Once you've extracted the file, you may follow the following steps for accessing the files in Adobe Acrobat Reader DC:

1. Open Adobe Acrobat Reader DC

2. Click Home

3. Click My Computer

4. Click the Browse button, then go to the extracted folder

5. You may then choose the PDF file you want to open then click Open