The tilt of the Earth is what causes the seasons...In the summer, the northern pole is pointed closer to the Sun giving the northern hemisphere more daylight hours. The opposite is true during the winter.
Only 1- the experiment can not show a cause and effect relationship if there are more than one factors contributing to the outcome.
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The answer is option D. The trees
<span>The first-line treatment for the patient should be Omeprazole combined with metronidazole and clarithromycin. The combination of metronidazole, omeprazole and clarithromycin is an effective treatment for pylori infection and and that this regimen remains very effective in the presence of metronidazole-resistant strains.</span>